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Annotation of sys/arch/alpha/tc/mcclock_ioasic.c, Revision 1.1.1.1

1.1       nbrk        1: /* $OpenBSD: mcclock_ioasic.c,v 1.6 2002/05/02 22:56:06 miod Exp $ */
                      2: /* $NetBSD: mcclock_ioasic.c,v 1.9 2000/07/04 02:37:51 nisimura Exp $ */
                      3:
                      4: /*
                      5:  * Copyright (c) 1994, 1995, 1996 Carnegie-Mellon University.
                      6:  * All rights reserved.
                      7:  *
                      8:  * Author: Chris G. Demetriou
                      9:  *
                     10:  * Permission to use, copy, modify and distribute this software and
                     11:  * its documentation is hereby granted, provided that both the copyright
                     12:  * notice and this permission notice appear in all copies of the
                     13:  * software, derivative works or modified versions, and any portions
                     14:  * thereof, and that both notices appear in supporting documentation.
                     15:  *
                     16:  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
                     17:  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
                     18:  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
                     19:  *
                     20:  * Carnegie Mellon requests users of this software to return to
                     21:  *
                     22:  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
                     23:  *  School of Computer Science
                     24:  *  Carnegie Mellon University
                     25:  *  Pittsburgh PA 15213-3890
                     26:  *
                     27:  * any improvements or extensions that they make and grant Carnegie the
                     28:  * rights to redistribute these changes.
                     29:  */
                     30:
                     31: #include <sys/param.h>
                     32: #include <sys/kernel.h>
                     33: #include <sys/systm.h>
                     34: #include <sys/device.h>
                     35:
                     36: #include <dev/dec/clockvar.h>
                     37: #include <dev/dec/mcclockvar.h>
                     38: #include <dev/ic/mc146818reg.h>
                     39: #include <dev/tc/tcvar.h>
                     40: #include <dev/tc/ioasicvar.h>                   /* XXX */
                     41:
                     42: struct mcclock_ioasic_clockdatum {
                     43:        u_char  datum;
                     44:        char    pad[3];
                     45: };
                     46:
                     47: struct mcclock_ioasic_softc {
                     48:        struct mcclock_softc    sc_mcclock;
                     49:
                     50:        struct mcclock_ioasic_clockdatum *sc_dp;
                     51: };
                     52:
                     53: int    mcclock_ioasic_match(struct device *, void *, void *);
                     54: void   mcclock_ioasic_attach(struct device *, struct device *, void *);
                     55:
                     56: struct cfattach mcclock_ioasic_ca = {
                     57:        sizeof (struct mcclock_ioasic_softc), mcclock_ioasic_match,
                     58:            mcclock_ioasic_attach,
                     59: };
                     60:
                     61: void   mcclock_ioasic_write(struct mcclock_softc *, u_int, u_int);
                     62: u_int  mcclock_ioasic_read(struct mcclock_softc *, u_int);
                     63:
                     64: const struct mcclock_busfns mcclock_ioasic_busfns = {
                     65:        mcclock_ioasic_write, mcclock_ioasic_read,
                     66: };
                     67:
                     68: int
                     69: mcclock_ioasic_match(parent, match, aux)
                     70:        struct device *parent;
                     71:        void *match, *aux;
                     72: {
                     73:        struct ioasicdev_attach_args *d = aux;
                     74:
                     75:        if (strncmp("TOY_RTC ", d->iada_modname, TC_ROM_LLEN))
                     76:                return (0);
                     77:
                     78:        return (1);
                     79: }
                     80:
                     81: void
                     82: mcclock_ioasic_attach(parent, self, aux)
                     83:        struct device *parent, *self;
                     84:        void *aux;
                     85: {
                     86:        struct ioasicdev_attach_args *ioasicdev = aux;
                     87:        struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)self;
                     88:
                     89:        sc->sc_dp = (struct mcclock_ioasic_clockdatum *)ioasicdev->iada_addr;
                     90:
                     91:        mcclock_attach(&sc->sc_mcclock, &mcclock_ioasic_busfns);
                     92: }
                     93:
                     94: void
                     95: mcclock_ioasic_write(dev, reg, datum)
                     96:        struct mcclock_softc *dev;
                     97:        u_int reg, datum;
                     98: {
                     99:        struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
                    100:
                    101:        sc->sc_dp[reg].datum = datum;
                    102: }
                    103:
                    104: u_int
                    105: mcclock_ioasic_read(dev, reg)
                    106:        struct mcclock_softc *dev;
                    107:        u_int reg;
                    108: {
                    109:        struct mcclock_ioasic_softc *sc = (struct mcclock_ioasic_softc *)dev;
                    110:
                    111:        return (sc->sc_dp[reg].datum);
                    112: }